Thunder Dolphin is a steel roller coaster at the Tokyo Dome City Attractions amusement park, which is part of Tokyo Dome City in Tokyo, Japan. The ride was designed and constructed by Intamin. At 262 feet (80 m) tall, Thunder Dolphin is currently the 6th tallest continuous circuit roller coaster in the world, behind Kingda Ka, Top Thrill Dragster, Steel Dragon 2000, Millennium Force, and Intimidator 305.Thunder Dolphin's 3,500 feet (1,100 m) long course passes through both a hole in the LaQua building, and through the Big-O, the world's first centerless Ferris wheel. Thunder Dolphin's maximum speed is 130 kilometres per hour (81 mph).

The park itself is open, Thunder Dolphin is listed on the website as "Temporary Closed" but I can't find anywhere that there has been an accident on it recently. The only recorded accident is on the 5th December 2010, a nine-year-old girl suffered minor injuries after being hit by a bolt which had fallen from the Thunder Dolphin roller coaster. And it was open for the whole season after the incident.

I am back from taming the awesome Thunder Dolphin on 10th, 11th and 12th September, quite allot of times.I was pleasantly surprised how fun the coaster was and how much airtime it had to offer. I am so glad it reopened on the 1st August so that I was able to ride it, and add it to my count.It did beat Sea Viper at Sea World Australia and is now my favourite coaster.